Sizing-classifier.



PATENTED JUNE 16 1908. W. L. CARD, F. W. BOSGO & O. I. GLASSBROOK.

SIZING GLASSIFIER. ABPLIOATION FILED SEPT. 24, 1907.

2 SHEETS-SHEET 2.

Svwewtpz wit" eooea UNITED STATES pn ENT OFFICE.

I WILLIAM L. CARD AND FRANCIS W. BOSCO, OF DENVER, COLORADO, ANDCLARENCE I. GLASSBROOK, OF SAN FRANCISCO, CALIFORNIA.

SIZING-CLASSIFIER.

Specification of Letters Patent.

Patented .Tune 16, 1908.

Application filed September 24:, 1907. Serial No. 394,358.

To all whom it may concern:

Be it known that we, WILLIAM L. CARD, FRANCIS W. Bosco, and CLARENCE I.GLAss- BROOK, citizens of the United States, residing, respectively, atDenver, in the county of Denver and State of Colorado; Denver, in thecounty of Denver and State of Colorado, and San Francisco, in the countyof San Francisco and State of-California, have invented certain new anduseful Improvements in Sizing-Classifiers; and Wedo'hereby declare thefollowin to be a full, clear, and exact description 0 the invention,such as will enable others skilled. in the art to which it appertains tomake and use the same.

Our invention relates to the construction of that class of apparatus,commonly termed sizing classifiers, and is especially designed forprogressively sizin the granular ingredients of a stream of u p as itflows from the stamps, Chilian mi or other crushing device, and fordelivering the several grades of pgulp to the appropriate tables of abattery.

y our devices the load of each table in the battery may be gagedaccording to the size and nature of the material fed thereto, andthe'several relative adjustments of each table may be permanentlyestablished whereby the best possibleresults are obtained with the leastpossible attention and expense.

The invention has for its objects the pro;

vision of sim le, inexpensive and ,eIfiGlBIlt means, durable incharacter, easily re aired by the ordinary mechanic and capa le ofsuccessful 0 eration b the ordinary mill employee, w ich shall eoperated with the minimum amount of water supplied through the bottom ofthe settling chamber, and in some instances without such water supply,where it is desirable to so operate the devices.

To this end the main feature of our invention, embraces the combinationwith a launder section and settlin chamber, of an interposed ex ansioncham er, and a shield or jetty whic. controls the intake leading fromthe expansion chamber to the settling chamber.

A second feature of our invention embraces the combination with alaunder section and settling chamber, of an interposed expansion chamberhaving metallic plates. which form the bottom of the expansion chamberand the intake connecting the expansion chamber with the settlingchamber.

A further feature of our invention embraces the combination with asettling chamber and an expansion chamber leading thereto, of a laundersection of general V cross sectional bottom delivering lnto theexpansion chamber, to induce stratification previous to the entrance ofthe pulp intothe expansion chamber on its way to the settling chamber.

There are other features of invention, embracing particular combinationsand special features of elemental construction, all as will hereinaftermore fully appear.

In the drawings chosen for the purpose of illustrating our invention,the scope whereof is pointed out in the claims, Figure l is alongitudinal section of the connecting portions of-a launder, a settlingchamber, and an interposed expansion chamber embodying our invention;Fig. 2 is a top plan view of POP tions of the launder and the expansionchamber shown in Fig. 1; Fig. 3 is a transverse vertical section of thelaunder on the line 33, Fig. 1; Fig. 4. is a transverse vertical sectionof the expansion chamber, the upstanding longitudinally disposeddividing jetty or double shield and the settling chamber, taken on theline 4-4, Fig. 1; Fig. 5is a transverse vertical section of a modifiedform of the expansion chamber, the dividing 'etty or shields omitted,the expansion chamer in this instance having a flat bottom; Fig. 6 is aplan view of a sizing classifier embodying our invention, in combinationwith a batteryof five concentrator tables; and Fig. 7 is a rear endelevation of the sizing classifier and battery of tables shown in Fig.6.

Like symbols refer to like parts wherever they occur.

The sizing classifier'as a whole will be comprised of a plurality ofexpansion chambers and settling chambers arranged in series andconnected by short sections of launder. The number of expansion andsettling chambers will correspond to the number of concentrator tablesin the battery employed.

We will now proceed to describe our invention more fully, so that othersskilled in the art to which it appertains may appl the same.

In the drawmgs, A indicates t e launder sections, B the expansionchambers, and C the drawing. In

the settling chambers. The launder sections A have a channel a, thebottom whereof is of tapering vertical cross-section, in order to inducestratification in the pulp previous to its entry into the expansionchamber, the launder being so disposed as to deliver pulp partiallystratified to the expansion chamber without disturbance of theStratification. Said section A may be in the form of a casting, yet whenbuilt up of wood the inclination of the bottom faces, which arepreferably equally inclined transversely to meet at an angle of ninetydegrees, may be effected by the insertion of fillets a in the corners ofthe trou h, as shown. -Tl1ese fillets should be beve ed or splayed attheir junction with the expansion 0 amber B, as at a to facilitate the sreading of the stream of ul as it en ters t e expansion chamber, an a soat their leading ends, as at a to cause the convergence of the stream asit leaves the ex ansion chamber B on .its Way to the succee ingexpansion chamber.

The width and depth of the launder sections A may be six or eight inchesmore or less, and the launder sections may be connected with theinterposed expansion chambers B by means of cleats a and bolts a or inany other suitable manner.

The interposed expansion chambers B may have either a flat bottom asindicated in Fig. 5 of the drawing, or a bottom formed of faces arrangedat any desired inclination. Such bottom is, however, preferably ofV-shape cross-section, having an included angle of about 135 degrees, asindicated in Fig. 4'of such case the bottom,

-Which is formed of metallic plates 6, may

have said plates bedded on fillets b if desired. Through said plates 6and the bottom of the ex ansion chamber B is formed the longitu inallydisposed intake slot 0 of the settling chamber 0, said slot beingenlarged below, as at c, tofacilitate the escape of the granular matterinto the settling tank C.

D indicates an adjustable upstanding longitudinally disposed dividingjetty or double shield which is'centrally disposed in the ex-- pansionchamber B. This double shield or ividing jetty is formed of thin,diverging blades of Wood or metal (i joined at their front ends to adistance piece d. The toe or pro'ecting lower end of this distance pieceexten s downwardly through the intake slot 0 in the bottom of the exansion chamber, said longitudinally dispose slot thus forming a guidefor the dividing jetty and permitting the adjustment thereoflongitudinally of the ex ansion chamber B.

xtending across the ex ansion chamber B and secured to the sides t ereofby threaded bolts and thumb nuts d is a clamp bar D which, or equivalentmeans, may be employed for adjustably securing the dividing etty D inthe expansion chamber B.

by the dividing jetty or shie It is to be noted that the expansionchamber B is wider than the launder section A, to permit of a horizontalex ansion or spread of the stream as it leaves t e launder. It shouldpreferably have a cross sectional area, after deducting the space occuied d D, equa to that of the launder section A. The width of thelongitudinally disposed intake slot 0 leading to the settling chamber 0is preferably from one-quarter to three-eighths of an inch, while itslength is coextensive with the settling chamber, sayin the neighborhoodof sixteen inches. The settling chamber 0 is preferably a pointed ortaper-box Whose greatest inside ength is substantially that of the slot0, its width bein about three inches and its depth about twe ve inches,more or less. This settling chamber is provided at its apex with a ipeflange 0 into the threaded opening of W ich is screwed a short ni ple cthat connects with a cross or T-pipe c ffaving a plug 0 To this T-pi e care connected the valved inlet pipe 0 an the valved outlet or pulpl pipe0 The inlet pipe 0 is connected wit a pipe 0 leading from the mill watertank, in order to supply additional water to the settlin chamber whendesired, and the outlet or pu p pipe cis provided with a suitable pipeor conduit leading to the appropriate concentrator table, T, T T T T asthe case may be, to' conduct the different sizes or grades of pulp tothe respective tables for final separation.

As before noted, the several ex ansion chambers B and settling chambersO are in terposed between short sections of launder A, and should be seton a down grade or at such an inclination from the first to the last ofthe series as will insure a current in the launder sufficient to carrythe rains of solid matter in suspension. For t 's purose a descendinggrade of from one to two inches to the foot will generally suffice. Theinclination of the expansion chamber B has also the effect of causingthe left hand portion (see Fig. 1) or intake of slot 0 to be elevatedwith respect to the right hand ortion or outlet of slot 0, thus addingto t e efiiciency of the devices at all times and es ecially when noadditional supply of settling chamber water is employed. v

The construction and arrangement of the devices being substantially suchas hereinbefore pointed out theiro eration will be as follows: After,the doubfe shield or dividingjetty D of each expansion chamber B hasbeen longitudinally ad'usted in the expansion chamber to give 1; edesired length of intake slot 0 (to the left of distance piece (1, Fig.1), and when the valves of the addi tional water inlet pipe c and thepulp outlet pipe 0 have been so adjusted with relation to each other andto the intake slot 0 as to obtain the desired result or size of pulpranules for that particular settling chamber and the correspondingconcentrator table, the settling chamber will be filled or allowed tofill with water. The pulp from the crushing devices on entering thefirst, or highest, launder section A (see Figs. 6 and 7) will in itspassage through such section stratify or arran e itself with the coarserand heavier partidles along .the bottom of the V-shaped channel and withthe remaining particles graded progressively in size as the surface isapproached, the finest particles being at or near the surface of thestream. On leaving this launder section A the stream will s read in theexpansion chamber B and W ile the coarser and heavier articles will passthrough the intake slot 0 to the left of distance iece (1) into thesettling chamber 0, the lig ter and smaller particles will pass with themain current on each side of the u standing longitudinally disposeddividing etty or double shield,. D, and into the next launder section.Any of the finer particles which may be carried down with the coarserand heavier material into the settling chamber will, by reason of theupward current in said settling chamber and also by reason of the intakeortion of slot 0 being higher than the outet portion of slot 0, rise orbe carried up ward into the slack water back of (or to the right of) thedividing jetty D and will again enter the current in the expansionchamber B on their way to the succeeding launder section, expansionchamber and settling chamber.

There will be a downward current from I the expansion chamber which willcarry the heavier and coarser material into the settlin chamber fromwhence it is delivered to t e concentrator table, and also a curvedupward flow from the settling chamber into the expansion chamber whichwill carry the lighter and finer particles back into the current of theex ansion chamber. illustrated by tfie arrows in Fig. 1 of the drawings,wherein the featherless arrows indicate the course of the heavier andcoarser material, and the feathered arrows that of the finer and lightermaterial.

The foregoing operation is repeated throughout the entire series ofexpansion chambers and settling chambers, the deposited particlesbecoming successively finer until the launder water escaping from thelast expansion chamber of the series carries only the slimes, which maybe delivered as at s, to a slime table for final treatment.

It is to be noted that if the shield or dividing jetty is moved to theleft (Fig. 1), the

intake through slot 0 will be shortened so that less material will passtherethrough, and that consequently there is a ro er re lation to beestablished between the length of the intake portion of said slot 0, theclear This is water admitted through the valve of inlet pipe 0 and theoutlet of pulp through the plug valve outlet pipe 0.

Itis to be understood that during the op eration of the devices theadjustments of the inlet and outletvalves of branches 0 and 0 should besuch that all parts of the settling chamber 0 are kept filled withwater.

It is sometimes advanta cons to change the connections of the inlet orclear water 0 and the lug 0 so that instead of a side flow there wil bea vertical flow of water to prevent the settling and discharge of anyfine pulp particles which may have entered the setting chamber C throughthe intake portion of slot 0.

. Though the several sections A, B and C of the sizing classifier areshown and described herein as constructed of wood, it will be evidentthat they may be constructed of metal, and, if desired, may be in theform of castings without departing from the spirit or scope of ourinvention: and wherever herein proportions have been stated the same areto be taken as matters of suggestion and not as limitations.

Among the advantages incident to the con struction of our sizingclassifier devices are inexpensiveness, durability, simplicity,effectiveness and capability of being repaired in situ and by ordinarymechanics.

The advanta es incident to the operation of our sizing c assifier are,that it can be thoroughly understood -and readily adjusted and operatedby the ordinary mill employee; that when once adjusted it will run fordays without requiring further attention; that it can be operatedsuccessfully with a minimum of clear water admitted through the bottomof the settling chamber, or with none at all where circumstances requireit and, finally, when properly adjusted the work done will nearly, ifnot fully, equal that done by a sys tem of screens, without thedifficulties, expense, labor and annoying delays incident to theoperating of a screen system.

Having thus described our invention, what we claim and desire to secureby Letters Patent is:

1. In a sizing classifier, the combination of a launder portion having abottom of tapering vertical cross section, an expansion chamber, thelaunder being so disposed as to deliver pul partially stratified to theexpansion cham er without disturbance of the Stratification, and asettling chamber with which the expansion chamber communicates.

2. In a sizing classifier, the combination of a launder portion having abottom of tapering vertical cross section, an expansion chamber, thelaunder being so disposed as to deliver pul partially stratified to theexpansion cham er without disturbance of the Stratification, and asettling chamber, the bottom of the expansion chamber having a lonitudinally disposed slot leading into the sett ing chamber.

3. In a sizing classifier, the combination of a launder portion having abottom of tapering vertical cross section, an expansion chamber having atransversely inclined longitudinally slotted bottom, the aunder being sodisposed as to deliver pulp artially stratified to the expansion chamberwithout disturbance of the stratification, and a settling chamber withwhich the expansion chamber communicates through its slotted bottom..

4. In a sizing classifier, the combination of a launder portion having abottom of tapering vertical cross section, an expansion chamber having atransversely inclined longitudinally slotted metallic bottom, thelaunder bein so disposed as to deliver partially stratified pulp to theexpansion chamber without disturbance of the stratification, and asettling chamber with which the expansion chamber communicates throughits slotted bottom.

5. In a sizing classifier, the combination of a launder portion having abottom of tapering vertical cross section, an expansion chamber having atransversely inclined slotted bottom, the launder being so disposed asto deliver pul partially stratified to the expansion cham er withoutdisturbance of the stratification, an upstanding longitudinally disposeddividing jetty arranged in the ex-.

pansion chamber, and a settling chamber with which the expansion chambercommunicates through its slotted bottom.

6. In a sizing classifier, the combination of an expansion chamber, anupstanding longitudinally disposed dividing jetty arranged in theexpansion chamber, and a settling chamber with which the expansionchamber communicates.

7. In a sizing classifier, the combination of an expansion chamber, anadjustable upstanding longitudinally disposed dividing jetty arranged inthe ex ansion chamber, and a settling chamber with which the expansionchamber communicates.

8. In a sizing classifier, the combination of an expansion chamberhaving a slotted bottom whereby it communicates with a settling chamber,an adjustable upstanding longitudinally disposed dividing jetty arrangedin the expansion chamber, and a settling chamber.

9. In a sizing classifier, the combination of an expansion chamberhaving a slotted transversely inclined metallic bottom, an adjustableupstanding lon itudinally disposed dividing etty arrange in the exansion chamber, and a settling chamber wit which the expansion chambercommunicates through its slotted bottom.

10. In a sizing classifier, the combination of a launder portion havinga bottom of tapering vertical cross section, an expansion chambercommunicates chamber the launder being so disposed as to deliver pulppartially stratified to the expansion chamber without disturbance of thestratification, having a slotted bottom, and a settling chamber withwhich the expansion through its slotted bottom.

11. In a sizing classifier, the combination of a launder portion havinga bottom of tapering vertical cross section, an expansion chamber havinga transversely inclined slotted bottom, an upstanding longitudinallydisposed dividing jetty arranged in the expansion chamber, and asettling chamber which communicates with the expansion chamber.

12. In a sizing classifier, the combination with a launder ortion havinga bottom of tapering vertical cross section, of an expansion chamberhaving a slotted metallic bottom of tapering vertical cross-section, anadjustable upstanding lon itudinally disposed dividing jetty arrange inthe expansion chamber, and a settling chamber which communicates withthe expansion chamber.

13. In a sizing classifier, the combination with a settling chamber, ofan expansion chamber having a jetty formed with blades, said jetty beingadapted to induce a current of pulp water through the settling tank fromthat part of the expansion chamberwhich is in front of such jetty tothat part of suchexpansion chamber which lies between-"the blades ofsuch jetty.

14. In a sizing classifier, the combination with a settling chamber, ofan expansion chamber having a slotted bottom, and a jetty which dividesthe slot in the bottom of the expansion chamber into intake and outletportions, said jetty having separated blades between which a portion ofthe said slot is located.

15. In a sizing classifier, the combination with a settling chamber,ofan expansion chamber having a transversely inclined bottom, and alaunder portion which is splayed at its junction with said-expansionchamber.

16.. In a sizing classifier, the combination with a settling chamber, ofan expansion chamber, and a launder portion which is splayed at itsjunction with said expansion chamber, said launder portion being oftapering vertical cross section.

17. The combination with a plurality of ore concentrating tables, of aplurality of sizing classifiers arranged in series on a descending gradeand connected by intermedi ate launder sections having bottoms oftapering vertical cross section, said sizing classifiers comprised ofexpansion chambers having slotted bottoms, adjustable dividing jettiesarranged in the expansion chambers, and settling chambers whichcommunicate with the expansion chambers.

18. The combination with a plurality of tion, of

ore concentrating tables, of a plurality of to the expansion chamberwithout dis'turb- 30 sizing classifiers, each of which classifiers has alongitudinally inclined expansion chamber having a slotted bottom, adividing jetty arranged in said expansion chamber and a settling chamberwhich communicates with its expansion chamber, the several classifiersbeing arranged in series on a descending grade, and intermediate launderportions having bottoms of tapering cross-section which connect theexpansion chambers.

19. In a sizing classifier, the combination with a launder sectionhaving a bottom of substantially V shape in vertical cross section, of asettling chamber, and an interposed expansion chamber having alongitudlnally disposed slot whereby it communicates with the settlingchamber, the launder being so disposed as to deliver pulp partiallyStratified to the expansion chamber without disturbance of thestratification.

20. In a sizing classifier, the combination With a launder sectionhaving a bottom of substantially V shape in vertical cross-seca settlingchamber, an interposed expansion chamber having alongitudinally disposedslot whereby it 'communicateswith the settling chamber, the launderbeing so disposed as to deliver pulp partially Stratified ance of thestratification, and a dividing jetty arranged in the expansion chamberon the line of said slot.

21. In a sizing classifier, the combination with a launder sectionhaving a bottom of substantially V shaped cross-section, a settlingchamber, an interposed expansion chamber having a longitudinallydisposed slot whereby it communicates with the settling chamber, thelaunden'being so disposed as to deliver pulp partially Stratified to theexpansion chamber without disturbance of the stratification, and adividing jetty longitudinally adjustable Within the expansion chamber inthe line of said slot.

In testimony whereof we afilx our signatures, in presence of subscribingwitnesses.

WILLIAM L. CARD. FRANCIS W. BOSCO. CLARENCE I. GLASSBROOK.

Witnesses as to signatures of Card and Bosco:

FRANK S. CARD, HENRY BOLTHOFF. Witnesses as to signature of Glassbrook:

W. H. MURPHY, A. E. LAWRENCE.

